kopia lustrzana https://gitlab.com/sane-project/backends
led calibration tuning
Stphane Voltz
rodzic
4c8267c1d6
commit
06847a5673
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@ -2797,11 +2797,11 @@ gl847_send_shading_data (Genesys_Device * dev, uint8_t * data, int size)
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return status;
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}
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/* this function does the led calibration by scanning one line of the calibration
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area below scanner's top on white strip.
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-needs working coarse/gain
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*/
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/** @brief calibrates led exposure
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* Calibrate exposure by scanning a white area until the used exposure gives
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* data white enough.
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* @param dev device to calibrate
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*/
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static SANE_Status
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gl847_led_calibration (Genesys_Device * dev)
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{
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@ -2826,7 +2826,10 @@ gl847_led_calibration (Genesys_Device * dev)
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/* move to reach calibration area */
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move = SANE_UNFIX (dev->model->y_offset_calib);
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move = (move * dev->motor.base_ydpi) / MM_PER_INCH;
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RIE(gl847_feed (dev, move));
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if(move>20)
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{
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RIE(gl847_feed (dev, move));
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}
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/* offset calibration is always done in color mode */
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channels = 3;
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@ -2836,9 +2839,9 @@ gl847_led_calibration (Genesys_Device * dev)
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num_pixels = (dev->sensor.sensor_pixels*used_res)/dev->sensor.optical_res;
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/* initial calibration reg values */
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memcpy (dev->calib_reg, dev->reg,
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GENESYS_GL847_MAX_REGS * sizeof (Genesys_Register_Set));
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memcpy (dev->calib_reg, dev->reg, GENESYS_GL847_MAX_REGS * sizeof (Genesys_Register_Set));
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/* set up for the calibration scan */
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status = gl847_init_scan_regs (dev,
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dev->calib_reg,
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used_res,
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@ -2854,7 +2857,6 @@ gl847_led_calibration (Genesys_Device * dev)
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SCAN_FLAG_DISABLE_GAMMA |
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SCAN_FLAG_SINGLE_LINE |
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SCAN_FLAG_IGNORE_LINE_DISTANCE);
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if (status != SANE_STATUS_GOOD)
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{
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DBG (DBG_error,
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@ -2863,55 +2865,52 @@ gl847_led_calibration (Genesys_Device * dev)
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return status;
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}
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RIE (gl847_bulk_write_register
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(dev, dev->calib_reg, GENESYS_GL847_MAX_REGS));
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total_size = num_pixels * channels * (depth/8) * 1; /* colors * bytes_per_color * scan lines */
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line = malloc (total_size);
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if (!line)
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return SANE_STATUS_NO_MEM;
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/* initial loop values and boundaries */
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exp[0]=sensor->expr;
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exp[1]=sensor->expg;
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exp[2]=sensor->expb;
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bottom[0]=40000;
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bottom[1]=50000;
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bottom[2]=50000;
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bottom[0]=39000;
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bottom[1]=49000;
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bottom[2]=49000;
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top[0]=45000;
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top[1]=55000;
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top[2]=55000;
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top[0]=41000;
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top[1]=51000;
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top[2]=51000;
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turn = 0;
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acceptable = SANE_FALSE;
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/* no move during led calibration */
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gl847_set_motor_power (dev->calib_reg, SANE_FALSE);
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do
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{
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/* set up exposure */
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sanei_genesys_set_double(dev->calib_reg,REG_EXPR,exp[0]);
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sanei_genesys_set_double(dev->calib_reg,REG_EXPG,exp[1]);
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sanei_genesys_set_double(dev->calib_reg,REG_EXPB,exp[2]);
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RIE (gl847_bulk_write_register
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(dev, dev->calib_reg, GENESYS_GL847_MAX_REGS));
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/* write registers and scan data */
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RIE (gl847_bulk_write_register (dev, dev->calib_reg, GENESYS_GL847_MAX_REGS));
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DBG (DBG_info, "gl847_led_calibration: starting first line reading\n");
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DBG (DBG_info, "gl847_led_calibration: starting line reading\n");
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RIE (gl847_begin_scan (dev, dev->calib_reg, SANE_TRUE));
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RIE (sanei_genesys_read_data_from_scanner (dev, line, total_size));
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/* stop scanning */
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RIE (gl847_stop_action (dev));
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if (DBG_LEVEL >= DBG_data)
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{
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snprintf (fn, 20, "led_%02d.pnm", turn);
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sanei_genesys_write_pnm_file (fn,
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line, depth, channels, num_pixels, 1);
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sanei_genesys_write_pnm_file (fn, line, depth, channels, num_pixels, 1);
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}
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acceptable = SANE_TRUE;
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/* compute average */
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for (j = 0; j < channels; j++)
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{
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avg[j] = 0;
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@ -2931,11 +2930,10 @@ gl847_led_calibration (Genesys_Device * dev)
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avg[j] /= num_pixels;
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}
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DBG (DBG_info, "gl847_led_calibration: average: "
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"%d,%d,%d\n", avg[0], avg[1], avg[2]);
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DBG (DBG_info, "gl847_led_calibration: average: %d,%d,%d\n", avg[0], avg[1], avg[2]);
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/* check if exposure gives average within the boundaries */
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acceptable = SANE_TRUE;
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for(i=0;i<3;i++)
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{
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if(avg[i]<bottom[i])
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@ -2949,7 +2947,6 @@ gl847_led_calibration (Genesys_Device * dev)
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acceptable = SANE_FALSE;
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}
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}
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RIE (gl847_stop_action (dev));
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turn++;
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}
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@ -2974,7 +2971,10 @@ gl847_led_calibration (Genesys_Device * dev)
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free (line);
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/* go back home */
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RIE (gl847_slow_back_home (dev, SANE_TRUE));
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if(move>20)
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{
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RIE (gl847_slow_back_home (dev, SANE_TRUE));
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}
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DBGCOMPLETED;
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return status;
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